You can set up public folders to share data such as calendars, contacts, emails, and tasks with other Microsoft Exchange 2019 users set up in the same IONOS contract.


  • Start Microsoft Outlook with the Microsoft Exchange 2019 account previously configured in it.

  • In the Home tab, click the mailbox name in the folder list on the left (if necessary).

  • If you don't already see the Public Folders option below your mailbox (as shown in the image below), switch to the folder list in the folder pane by pressing the [CTRL] and 6 keys simultaneously.

  • Click the arrow next to All Public Folders. This will expand the list of additional subfolders created by the system.

  • Find the subfolder that has ocsou or ocsu within its name. In this folder, you can create new public folders and manage any existing public folders.

  • If desired, click on one of the public folders that you want to edit.

  • By right-clicking on one of the subfolders, you can select the Properties item. Within the folder's properties, as an administrator, you will find various parameters for managing the folder. For example, in the Permissions tab, you can define which user can edit, read or even delete elements (e.g. appointment entries) within the folder.

Detailed documentation on managing public folders can also be found on Microsoft's help pages:

Create and share a public folder in Outlook

Set or change permissions for a public folder